/*
 * Copyright (C) 2011 Nicola Bonzanni
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package nl.vu.few.ibivu.jlemon;

import nl.vu.few.ibivu.jlemon.concepts.Arc;
import nl.vu.few.ibivu.jlemon.concepts.ItemIterator;
import nl.vu.few.ibivu.jlemon.concepts.Path;

public abstract class AbstractPath<A extends Arc & Comparable<A>> implements Path<A> {

	@Override
	public boolean empty() {
		return length() == 0;
	}

	@Override
	public void clear() {
		throw new UnsupportedOperationException();
	}

	@Override
	public ItemIterator<A> nthIterator(int n) {
		return new PathIterator<A>(this, n);
	}

	@Override
	public A front() {
		return nth(0);
	}

	@Override
	public void addFront(A arc) {
		throw new UnsupportedOperationException();
	}

	@Override
	public void eraseFront() {
		throw new UnsupportedOperationException();
	}

	@Override
	public A back() {
		return nth(length() - 1);
	}

	@Override
	public void addBack(A arc) {
		throw new UnsupportedOperationException();
	}

	@Override
	public void eraseBack() {
		throw new UnsupportedOperationException();
	}

}
